| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.cassandra.db.virtual; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import org.apache.cassandra.db.marshal.DoubleType; |
| import org.apache.cassandra.db.marshal.UTF8Type; |
| import org.apache.cassandra.dht.LocalPartitioner; |
| import org.apache.cassandra.metrics.CQLMetrics; |
| import org.apache.cassandra.schema.TableMetadata; |
| import org.apache.cassandra.cql3.QueryProcessor; |
| |
| |
| final class CQLMetricsTable extends AbstractVirtualTable |
| { |
| public static final String TABLE_NAME = "cql_metrics"; |
| public static final String PREPARED_STATEMENTS_COUNT = "prepared_statements_count"; |
| public static final String PREPARED_STATEMENTS_EVICTED = "prepared_statements_evicted"; |
| public static final String PREPARED_STATEMENTS_EXECUTED = "prepared_statements_executed"; |
| public static final String PREPARED_STATEMENTS_RATIO = "prepared_statements_ratio"; |
| public static final String REGULAR_STATEMENTS_EXECUTED = "regular_statements_executed"; |
| public static final String NAME_COL = "name"; |
| public static final String VALUE_COL = "value"; |
| |
| private final CQLMetrics cqlMetrics; |
| |
| CQLMetricsTable(String keyspace) |
| { |
| this(keyspace, QueryProcessor.metrics); |
| } |
| |
| // For dependency injection |
| @VisibleForTesting |
| CQLMetricsTable(String keyspace, CQLMetrics cqlMetrics) |
| { |
| super(TableMetadata.builder(keyspace, TABLE_NAME) |
| .comment("Metrics specific to CQL prepared statement caching") |
| .kind(TableMetadata.Kind.VIRTUAL) |
| .partitioner(new LocalPartitioner(UTF8Type.instance)) |
| .addPartitionKeyColumn(NAME_COL, UTF8Type.instance) |
| .addRegularColumn(VALUE_COL, DoubleType.instance) |
| .build()); |
| this.cqlMetrics = cqlMetrics; |
| } |
| |
| @Override |
| public DataSet data() |
| { |
| SimpleDataSet result = new SimpleDataSet(metadata()); |
| addRow(result, PREPARED_STATEMENTS_COUNT, cqlMetrics.preparedStatementsCount.getValue()); |
| addRow(result, PREPARED_STATEMENTS_EVICTED, cqlMetrics.preparedStatementsEvicted.getCount()); |
| addRow(result, PREPARED_STATEMENTS_EXECUTED, cqlMetrics.preparedStatementsExecuted.getCount()); |
| addRow(result, PREPARED_STATEMENTS_RATIO, cqlMetrics.preparedStatementsRatio.getValue()); |
| addRow(result, REGULAR_STATEMENTS_EXECUTED, cqlMetrics.regularStatementsExecuted.getCount()); |
| |
| return result; |
| } |
| |
| private void addRow(SimpleDataSet dataSet, String name, double value) |
| { |
| dataSet.row(name) |
| .column(VALUE_COL, value); |
| } |
| } |